"B. Richardson 1934 8 General Account rats nest. The traps were built with bacon and oat meal. Caught on Peromyscus truei galleti in the brush trail sit. The weather conditions were clear all night and rather cold although it had been raining the latter part of the previous day. Feb 4 Strawberry Canyon Berkeley, Alameda Co. Calif. In our field study several Microtus californicus in their burrows. Out of the class of approximately 50 students each of which were digging and tearing out Microtus mammals and burrows for 4 hours, only 4 rats with young were obtained. Several subadult specimens were obtained from the burrow system as well as several